According to Boundless, soil is a mix of varying amounts of inorganic matter, organic matter, water and air. The components in soil provide nutrients for plant uptake and can fluctuate on a daily basis, depending on water supply, cultivation practices and soil type.Know More
According to the University of Hawaii, typical soil consists of approximately 45 percent mineral, 5 percent organic matter, 20 to 30 percent water and 20 to 30 percent air. The ratio of air and water in the pore spaces often changes seasonally depending on the amount of precipitation and groundwater discharge. The mineral, or inorganic, portion of the soil consists of three particle-size classes: sand, silt and clay.
According to National Oceanic and Atmospheric Administration, sand, silt and clay are less than 2 millimeters in diameter. These particles are collectively referred to as the fine earth fraction soil, whereas larger particles, such as pebbles, cobbles and boulders, are referred to as rock fragments. The organic matter in the soil consists of a complex mixture of substances with varying chemical contents. The elemental composition of organic matter includes carbon, oxygen, hydrogen, nitrogen, phosphorus and sulfur. According to Boundless, the organic material of soil, called humus, is also made up of microorganisms and dead animals and plants in varying stages of decay.Learn more in Soil
Pore space in soil is the volume of space that can be filled with water or air. A large pore space is normally filled with air while smaller pore spaces are primarily filled with water.Full Answer >
According to the non-profit project Coral Science, coral reefs are not lodged in soil. The rocky substance in which they are fixed is made by the corals themselves. They live in colonies made of many polyps that build skeletons from the underside of their skin.Full Answer >
There are four principal contributors to acidic soil: rainfall and leaching, the decomposition of organic materials, the introduction of high-acidity materials into the soil and the harvest of abundantly yielding crops. The more time that passes, the more likely a soil becomes acidic and the less easily plants grow. One way the acidity of soil can be neutralized is to add lime to the soil.Full Answer >
Chaparral soil is typically dry and rich in iron oxides that give it a cinnamon or chestnut color. It contains little clay and lacks organic material.Full Answer >